package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceimpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 根据时间区间统计营业额
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();

        //将每一天的日期添加到集合中，计算每一天的营业额
        dateList.add(begin);
        while(!begin.equals(end)){
            begin=begin.plusDays(1);  //日期计算，获得指定日期后1天的日期
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);

            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("begin",beginTime);
            map.put("end",endTime);
            Double turnover = orderMapper.sumByMap(map);

            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        //数据封装
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))   //将集合转换成，分隔的字符串
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 根据时间区间统计用户数量
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        //将每一天的数据添加到集合中
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList=new ArrayList<>();   //新增用户数
        List<Integer> totalUserList=new ArrayList<>();   //总用户数

        for (LocalDate date : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            //新增用户数量   select count（id） from user where create_time<?
            Integer newUser=getUserCount(beginTime,endTime);

            //总用户数量 select count(id) from user where create_time<?
            Integer totalUser=getUserCount(null,endTime);

            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }

        //封装
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }


    /**
     * 根据时间区间统计用户数量（接上）
     * @param beginTime
     * @param endTime
     * @return
     */
    private Integer getUserCount(LocalDateTime beginTime, LocalDateTime endTime) {
        Map map = new HashMap();
        map.put("begin",beginTime);
        map.put("end", endTime);
        return userMapper.countByMap(map);
    }

    /**
     * 根据时间区间统计订单数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //每天订单总数集合
        List<Integer> orderCountList = new ArrayList<>();
        //每天有效订单数集合
        List<Integer> validorderCountList= new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            //查询每天的总订单数 select count（id） from orders where order_time>? and order_time<?
            Integer orderCount=getOrderCount(beginTime,endTime,Orders.COMPLETED);
            //查询每天的有效订单数 select count(id) from orders where order_time >? and order_time<? and status=?
            Integer validordercount=getOrderCount(beginTime,endTime,Orders.COMPLETED);
            orderCountList.add(orderCount);
            validorderCountList.add(validordercount);
        }
        //时间区间内的总订单数
        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();
        //时间区间内的总有效订单数
        Integer validOrderCount=validorderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate=0.0;
        if (totalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validorderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

    }

    /**
     * 根据时间区间统计订单数据(接上)
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime,LocalDateTime endTime,Integer status){
        Map map=new HashMap();
        map.put("status",status);
        map.put("begin",beginTime);
        map.put("end",endTime);

        return orderMapper.countByMap(map);
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);

        String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
        String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }


    /**
     * 导出近30天的运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) throws IOException {
        LocalDate begin = LocalDate.now().minusDays(30);   //正数为当前时间减去30天，复数为当前时间加上30天
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData=workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN),LocalDateTime.of(end,LocalTime.MAX));
        InputStream inputStream=this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try{
        //基于模板文件在内存中创建一个新的Excel文件
        XSSFWorkbook workbook=new XSSFWorkbook(inputStream);
        //获得Excel文件中的一个sheet页
        XSSFSheet sheet = workbook.getSheetAt(0);
        //赋值第二行时间value
        sheet.getRow(1).createCell(1).setCellValue(begin+"至"+end);
        //获得第4行
        XSSFRow row=sheet.getRow(3);
        row.getCell(2).setCellValue(businessData.getTurnover());
        row.getCell(4).setCellValue(businessData.getValidOrderCount());
        row.getCell(6).setCellValue(businessData.getNewUsers());

        //获得第五行
        row=sheet.getRow(4);
        row.getCell(2).setCellValue(businessData.getValidOrderCount());
        row.getCell(4).setCellValue(businessData.getUnitPrice());
        for (int i = 0; i < 30; i++) {
            LocalDate date = begin.plusDays(i);
            //准备明细数据
            businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
            row = sheet.getRow(7 + i);
            row.getCell(1).setCellValue(date.toString());
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(3).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(5).setCellValue(businessData.getUnitPrice());
            row.getCell(6).setCellValue(businessData.getNewUsers());
        }
        //通过输出流将文件下载到客户端浏览器中
        ServletOutputStream out = response.getOutputStream();
        workbook.write(out);
        //关闭资源
        out.flush();
        out.close();
        workbook.close();

    }catch (IOException e){
        e.printStackTrace();

    }
    }
}
